Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the
data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing
this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302.
Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid
OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.
1. REPORT DATE (DD-MM-YY)
3. DATES COVERED (From - To)
2. REPORT TYPE
December 1999
4. TITLE AND SUBTITLE
5a. CONTRACT NUMBER
Hydraulic and Physical Properties Affecting Ice Jams
5b. GRANT NUMBER
5c. PROGRAM ELEMENT NUMBER
6. AUTHOR(S)
5d. PROJECT NUMBER
5e. TASK NUMBER
Kathleen D. White
5f. WORK UNIT NUMBER
33134
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION REPORT
NUMBER
Cold Regions Research and Engineering Laboratory
CRREL Report 99-11
U.S. Army Engineer Research and Development Center
72 Lyme Road
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSOR / MONITOR'S ACRONYM(S)
Office of the Chief of Engineers
Washington, D.C. 20314-1000
11. SPONSOR / MONITOR'S REPORT
NUMBER(S)
12. DISTRIBUTION / AVAILABILITY STATEMENT
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. SUPPLEMENTARY NOTES
14. ABSTRACT
Hydraulic modeling of ice jams can be used to predict jam location, stages, thickness, and other characteristics. Knowledge
of the range and variability of hydraulics and physical properties affecting ice jams is necessary to reduce the uncertainty
associated with such modeling. This report provides an overview of the processes involved in ice jam hydraulics and dis-
cusses properties important in these processes.
15. SUBJECT TERMS
Coefficient of internal friction
Ice characteristics
Ice properties
Frazil
Ice cohesion
Ice roughness
Ice accumulation porosity
Ice jam
River ice
16. SECURITY CLASSIFICATION OF:
17. LIMITATION OF
18. NUMBER
19a. NAME OF RESPONSIBLE PERSON
OF ABSTRACT
OF PAGES
19b. TELEPHONE NUMBER (include area code)
a. REPORT
b. ABSTRACT
c. THIS PAGE
40
Unclassified
Unclassified
Unclassified
Standard Form 298 (Rev. 8-98)
Prescribed by ANSI Std. 239.18
Previous Page
